Answer: clamber

AnswerCrossword Clue
CLAMBERScramble on all fours
CLAMBERClimb up
CLAMBERScramble up.
CLAMBERClimb with difficulty.
CLAMBERMove with effort
CLAMBERAscend with effort
clamberto climb awkwardly
clamberto climb awkwardly (as by scrambling) clambered over the rocks